Apparatus for manufacturing knop yarn



y 9, 1964 H. SERVAGE 3,133,401

APPARATUS FOR MANUFACTURING KNOP YARN Filed April 30, 1962 2Sheets-Sheet 1 V Inventor H IVE/ Slaw/18E- Attorney May 1 1964 H.SERVAGE APPARATUS FOR MANUFACTURING KNOP YARN 2 Sheets-Sheet 2 FiledApril 30, 1962 lnvenlor United States Patent 3,133,401 APPARATUS nonMANUFACTURING KNOP YARN Henri Servage, Cremieu, Isere, France, assignort0 Mouiinage et Retorderie dc Chavanoz, S.A., Chavanoz, Isere, France, acorporation of France Filed Apr. 30, 1962, Ser. No. 191,698 Claimspriority, application France Apr. 28, 1961 2 Claims. (Cl. 57-18) Thisinvention relates to a method and apparatus for manufacturing noveltyyarns of the type having spaced knops disposed on a core yarn.'Copending application Serial No. 859,511, now Patent No. 3,074,223,describes an apparatus of this type wherein a core yarn is advancedintermittently and a cover yarn is wound around the core yarn at asubstantially uniform rate.

In this apparatus the cover yarn forms a knop as it is wound around thecore yarn during the times when the core yarn is stationary. These knopsare spaced by a distance determined by the advance of the core yarnbetween the periods of dwell.

In accordance with the disclosure of said copending application, theintermittent movement of the core yarn is obtained by a Geneva typedrive which is capable of causing rapid movement of the core yarnbetween periods of dwell.

In accordance with the present invention the intermittent drive of thecore yarn is obtained by means of gear trains which are variouslyconnected in driving relationship to the core yarn by means of anelectromagnetic clutch which is arranged to be actuated in a variabletimed relationship so as to provide an irregular spacing betweensuccessive knops.

The arrangement is such that the core yarn may be fed at two differentrates which are respectively slow and fast by suitable actuation of theclutch.

Various other features and advantages will be apparent as the nature ofthe invention is more fully disclosed.

The invention will be better understood from the following descriptiontaken in connection with the accompanying drawings in which a specificembodiment has been set forth for purposes of illustration.

In the drawings:

PEG. 1 is a front elevation of an apparatus embodying the invention;

FIG. 2 is a side elevation of the apparatus of FIG. 1;

FIG. 3 is a detail of the spindle shown in FIG. 1; and

FIG. 4 is a detail of the clutch control circuit.

In the drawings a hollow spindle 1 is continuously rotated by a belt 2.Arranged on this spindle is a spool 3, carrying a package 4 of lappingor cover yarn. A tube 5 is centered in the axial passage of the spindle1 by two bearings 6. At the upper end, this tube 5 carries a slightlyconical or cylindrical needle 7 which passes through a hole 8 in a smallcap 9.

The lapping yarn is taken from the package 4 and is unwound, forming aconventional balloon which is wound around a core yarn 11 drawn off by adevice to be described from a bobbin 12, by being unwound endwise orsideways, travelling by way of the tensioning device 13 and the tube 5.The winding is produced while the core yarn travels in the vicinity ofthe needle 7.

3,133,491 Patented May 19, 1964 This shaft 14 carries at its lower end astack 23 of pinions of decreasing diameter, while the shaft 20 carries asimilar stack 24 at the upper end.

One of the pinions of the stack 23 meshes with a pinion 25 on a smallshaft 26, the other end of which carries a bevel pinion 27 meshing witha bevel pinion 28 on the shaft 29. The latter carries at one end a smallwonn 31, and at the other end a bevel pinion 32.

The worm 31 causes the rotation of a wheel 30 attached to a disc 33, onwhich a rod 35 is pivoted at 34. The rod 35 is pivoted at the other endat 36 to a lever 37, turning on the shaft 38, on which is fixedlyarranged a cam 39. A roller 49 on a rocking lever 41 bears against thecam 39. A contact strip 4-2 attached to the lever 4-1 opens and closes acircuit in the box 43.

According to FIG. 4, the closing of the contact causes the current toflow in the coil 44, which then pulls up the core connected to the rod46 articulated to a cranked lever 47 pivoting at 48. '(See FIG. 1, topright-hand side.) The closing of the circuit causes the lowering of therod and the claw member '49, which forms a clutch with the opposite clawmember 50, is disengaged from the latter. The claw member or clutchplate 49 can slide but not turn on the shaft 51, which carries thedriving roller 52 for the spool 53 on which the lap yarn coming from thespindle is wound, after passing through the guide '54 and a traversingsystem (not shown). It is the spool 53 which draws off the lap yarn. Theclutch plate 53 is actually mounted on a small shaft 60 co-axial withthe shaft 51.

The shaft 60 rotates continuously at high speed. It is controlled by theshaft 20, by means of the stack or set of pinions 24, the pinion 53 onthe rod 54 and the bevel pinions 55, 56, 5'7, 58, the latter being keyedon the shaft 611.

The shaft 51 is normally subjected to a slow regular rotation, when theclutch 49, 59 is not operating. This slow regular rotation is derivedfrom the pinion 28, which is controlled by the shaft 30, as indicatedabove. The pinion 28 controls another bevel pinion 59 on the shaft 61,which causes the operation of a train of reduction gears 62, thelatter-of which rotates the shaft '63 with a toothed wheel 64 driving achain 6 5, which passes around another free wheel 66. The latter isfixed on the shaft 67 with the toothed wheel 68, driving the chain 69and the toothed wheel 76 which is fixed on the shaft 51. The latter canrotate either at slow speed or at high speed, through a known free wheelsystem 66 (not shown) associated with the clutch plate 49.

For the control operation, there is used a difierential system 71, onepinion of which is set in rotation by the shaft '61 by means of atoothed wheel '72 from a chain 73, and another toothed wheel 74,attached to one of the pinions of the differential 71 and fixed on theshaft 38. The other pinion of the differential, keyed on the shaft 38,controls the cam 39, while the satellite is connected by the lever 37 tothe rod 35. When the core yarn 11 is being drawn slowly, the lappingyarn is wound as a knop and when it is withdrawn rapidly, it forms anassembly with the core yarn. Since the rapid withdrawal periods arevaried, a yarn is obtained which has knops irregularly spacedtherealong.

What is claimed is:

1. Apparatus for making a novelty yarn composed of a core yarn having alap yarn wound therearound in the form of spaced knops which comprises ahollow spindle and feed means adapted to feed said core yarn axiallytherethrough and having winding means positioned "to wind said lap yarnaround said core yarn as the latter advances, said feed means comprisinga first gear train connected to advance said core yarn at a relativelyslow rate, a second gear train adapted to advance said core yarn at amore rapid rate, a mechanical clutch adapted in one position to connectsaid first gear train in driving relation with said core yarn and in asecond position to connect said second gear train in drivingrelationship with said core yarn, electromagnetic means connected toactuate said clutch and timed means connected to energize saidelectromagnetic means intermittently and for varying periods of time.

2. Apparatus as set forth in claim 1 in which said slow feed gear trainis permanently connected to drive said core yarn and includes a freeWheeling device to permit a rapid feed of said core yarn when saidclutch is actuated to connect said second gear train in drivingrelationship to said core yarn.

References Cited in the file of this patent UNITED STATES PATENTS2,211,642 Bry Aug. 13, 1940 2,608,048 Egge Aug. 26, 1952 2,731,789Holder Jan. 24, 1956 2,746,236 Kufner May 22, 1956 2,901,884 einbergeret a1 Sept. 1, 1959 2,923,120 Bush et a1. Feb. 2, 1960

1. APPARATUS FOR MAKING A NOVELTY YARN COMPOSED OF A CORE YARN HAVING ALAP WOULD THEREAROUND IN THE FORM OF SPEED KNOPS WHICH COMPRISES AHOLLOW SPINDLE AND FEED MEANS ADAPTED TO FEED SAID CORE YARN AXIALLYTHERETHROUGH AND HAVING WINDING MEANS POSITIONED TO WIND SAID LAP YARNAROUND SAID CORE YARN AS THE LATTER ADVANCES, SAID FEED MEANS COMPRISINGA FIRST GEAR TRAIN CONNECTED TO ADVANCE SAID CORE YARN AT A RELATIVELYSLOW RATE, A SECOND GEAR TRAIN ADAPTED TO ADVANCE SAID CORE YARN AT AMORE RAPID RATE, A MECHANICAL CLUTCH ADAPTED IN ONE POSITION TO CONNECTSAID GEAR TRAIN IN DRIVING RELATION WITH SAID CORE YARN IN A SECONDPOSITION TO CONNECT SAID SECOND GEAR TRAIN IN DRIVING RELATIONSHIP WITHSAID CORE YARN, ELECTROMAGNETIC MEANS CONNECTED TO ACTUATE SAID CLUTCHAND TIMED MEANS CONNECTED TO ENERGIZE SAID ELECTROMAGNETIC MEANSINTERMITTENTLY AND FOR VARYING PERIODS OF TIME.